How bad is an air quality index of 142? Spangler said the air is considered "deteriorating" when it has an index higher than 35.

A storm is predicted to hit the Wasatch Front Wednesday.

"If it's not very strong and it doesn't have much of a punch, then it might lessen a little bit -- but if we don't have a really good storm it will just continue to build," [DEQ Spokesperson] Spangler said.

Pardon me while I unpack the rebreather.

UPDATE: h/t to Kyland, who pointed me to this amazing little graphic. From AirNow: